Need to know what 2 use

Okay, i have finally taught myself how to use Visual C# and Visual C++. Now my first question is what is better 4 making an MMORPG- C# or C++? My Next question is what is the difference between XNA and DirectX? Which is better in programming a game?

 

XNA is an interface to directX, meaning for performance straight DirectX is superior - for easy coding XNA is an option. However, I would use neither of those two IDE's, especially the C++ CLR for creating a game.

I would use straight C and C++ with either OpenGL or DirectX.

There is an opensource engine that you could use, http://irrlicht.sf.net/ - it's pretty good, and easy for 3D. However, judging on the fact that you don't know what to use, likely because you both don't have enough experience and knowledge, and the fact that you don't know what you want, you aren't ready to make a game.